The great sage Maitreya continued: My dear Vidurajī, at that time all the brāhmaṇas highly praised and glorified King Pṛthu, and the best singers of Gandharvaloka chanted his glories. The inhabitants of Siddhaloka showered flowers, and the beautiful women in the heavenly planets danced in ecstasy.
(Srimad Bhagavatam------4:15:7------translation).

The inhabitants of Gandharvaloka and Apsaroloka made Viśvāvasu into a calf, and they drew the milk into a lotus flower pot. The milk took the shape of sweet musical art and beauty.
(Srimad Bhagavatam------4:18:17------translation).

When Lord Viṣṇu appeared in the sacrificial arena, Lord Brahmā, Lord Śiva and all the chief predominating personalities of every planet, as well as their followers, came with Him. When He appeared on the scene, the residents of Gandharvaloka, the great sages, and the residents of Apsaroloka all praised Him.
(Srimad Bhagavatam------4:19:4------translation).

King Pṛthu worshiped the demigods, the great sages, the inhabitants of Pitṛloka, the inhabitants of Gandharvaloka and those of Siddhaloka, Cāraṇaloka, Pannagaloka, Kinnaraloka, Apsaroloka, the earthly planets and the planets of the birds. He also worshiped many other living entities who presented themselves in the sacrificial arena. With folded hands he worshiped all these, as well as the Supreme Personality of Godhead and the personal associates of the Lord, by offering sweet words and as much wealth as possible. After this function, they all went back to their respective abodes, following in the footsteps of Lord Viṣṇu.
(Srimad Bhagavatam------4:20:35-36------translation).

While Śatadruti was thus being married, the demons, the denizens of Gandharvaloka, the great sages, and the denizens of Siddhaloka, the earthly planets and Nāgaloka, although highly exalted, were all captivated by the tinkling of her ankle bells.
(Srimad Bhagavatam------4:24:12------translation).

Time is figuratively described here as Caṇḍavega. Since time and tide wait for no man, time is herein called Caṇḍavega, which means "very swiftly passing away." As time passes, it is calculated in terms of years. One year contains 360 days, and the soldiers of Caṇḍavega herein mentioned represent these days. Time passes swiftly; Caṇḍavega's powerful soldiers of Gandharvaloka very swiftly carry away all the days of our life. As the sun rises and sets, it snatches away the balance of our life-span. Thus as each day passes, each one of us loses some of life's duration. It is therefore said that the duration of one's life cannot be saved. But if one is engaged in devotional service, his time cannot be taken away by the sun.
(Srimad Bhagavatam------4:27:13------purport).

As Lord Brahmā descended on his carrier, the great swan, all the residents of the planets named Siddhaloka, Gandharvaloka, Sādhyaloka and Cāraṇaloka, as well as great sages and demigods flying in their different airplanes, assembled within the canopy of the sky to receive Lord Brahmā and worship him. As he received respect and adoration from the residents of the various planets, Lord Brahmā appeared just like the full moon surrounded by illuminating stars. Lord Brahmā's great swan then arrived at the border of Gandhamādana Hill and approached Prince Priyavrata, who was sitting there.
(Srimad Bhagavatam------5:1:8------translation).

According to Brahmā-saṁhitā, each universe is filled with different planetary systems, and every system has a unique opulence. For example, on Siddhaloka, all the residents are very advanced in the powers of mystic yoga. They can fly from one planet to another without airplanes or other flying machines. Similarly, the residents of Gandharvaloka are expert in musical science, and those on Sādhyaloka are all great saints. The interplanetary system undoubtedly exists, and residents of different planets may go from one to another. On this earth, however, we have not invented any machine that can go directly from one planet to another, although an unsuccessful attempt has been made to go directly to the moon.
(Srimad Bhagavatam------5:1:8------purport).

Śrīla Nārada Muni is giving a practical example from his past life. Formerly, during the previous lifetime of Lord Brahmā, Nārada Muni was one of the denizens ofGandharvaloka, but unfortunately, as will be explained, he fell from his exalted position in Gandharvaloka, where the inhabitants are extremely beautiful and expert in singing, to become a śūdra. Nonetheless, because of his association with devotees, he became more fortunate than he was in Gandharvaloka. Even though cursed by the prajāpatis to become a śūdra, in his next life he became the son of Lord Brahmā.
(Srimad Bhagavatam------7:15:69------purport).

From the description of the beauty of Nārada Muni when he was one of the denizens of Gandharvaloka, it appears that everyone on that planet is extremely beautiful and pleasing and always decorated with flowers and sandalwood. Upabarhaṇa was Nārada Muni's name previously. Upabarhaṇa was specifically expert in decorating himself to attract the attention of women, and thus he became a playboy, as described in the next verse. To be a playboy in this life is unfortunate because too much attraction to women will lead one to fall into the association of śūdras, who can easily take advantage of mingling with women without restriction.
(Srimad Bhagavatam------7:15:70------purport).

Saṅkīrtana means chanting of the holy name of the Lord. The Hare Kṛṣṇa movement is not a new movement as people sometimes mistakenly think. The Hare Kṛṣṇa movement is present in every millennium of Lord Brahmā's life, and the holy name is chanted in all the higher planetary systems, including Brahmaloka and Candraloka, not to speak of Gandharvaloka and Apsaroloka. The saṅkīrtana movement that was started in this world five hundred years ago by Śrī Caitanya Mahāprabhu is therefore not a new movement. Sometimes, because of our bad luck, this movement is stopped, but Śrī Caitanya Mahāprabhu and His servants again start the movement for the benefit of the entire world or, indeed, the entire universe.
(Srimad Bhagavatam------7:15:71------purport).

The Gandharvas, who are residents of Gandharvaloka, are celebrated as celestial singers. Whenever singing is needed in the celestial planets, the Gandharvas are invited to sing. The Gandharvas can sing continuously for days, and therefore Vakreśvara Paṇḍita wanted to dance as they sang.
(Sri Caitanya caritamrta------1:10:19------purport).

This is a quotation from Śrīmad-Bhāgavatam (10.34.9). The inhabitants of Vṛndāvana, under the leadership of Nanda Mahārāja, once went to the bank of the Sarasvatī on a pilgrimage. Nanda Mahārāja was fasting, and he lay down near the forest. At that time a serpent, who was formerly cursed by Āṅgirasa Ṛṣi, appeared. This serpent had formerly been named Sudarśana, and he had belonged to the Gandharvaloka planet. However, because he joked with the ṛṣi, he was condemned to take on the body of a big snake. When this serpent attacked Nanda Mahārāja, Nanda Mahārāja began to call, "Kṛṣṇa! Help!" Kṛṣṇa immediately appeared and began to kick the serpent with His lotus feet. Due to being touched by the Lord's lotus feet, the serpent was immediately freed from the reactions of his sinful life. Being freed, he again assumed his original form of Sudarśana, the Gandharva.
(Sri Caitanya caritamrta------2:25:77------purport).

The demigods became overwhelmed with joy and showered flowers on the Supreme Personality of Godhead, Kṛṣṇa, and thus they worshiped Him. The denizens of heaven danced in jubilation, and the denizens in Gandharvaloka offered various kinds of prayers. Drummers beat drums in jubilation, the brāhmaṇas recited Vedic hymns, and all the devotees of the Lord chanted the words "Jaya! Jaya! All glories to the Supreme Personality of Godhead!"
(Krsna Book).

The gopīs, being naturally very affectionate to Kṛṣṇa, began to offer Him yogurt mixed with their tears, and they poured incessant blessings upon Him. Mother Yaśodā, mother Rohiṇī, Nanda and Balarāma, who is the strongest of the strong, embraced Kṛṣṇa one after another and, from spontaneous feelings of affection, blessed Him over and over again. In the heavens, different demigods from different planetary systems, such as Siddhaloka, Gandharvaloka and Cāraṇaloka, also began to show their complete satisfaction. They poured showers of flowers on the surface of the earth and sounded different conchshells. There was beating of drums, and being inspired by godly feelings, residents of Gandharvaloka began to play on their tambouras to please the Lord. After this incident, the Supreme Personality of Godhead, surrounded by His dear friends and the animals, returned to His home. As usual, the gopīs began to chant the glorious pastimes of Lord Kṛṣṇa with great feeling, for they were chanting from the heart.
(Krsna Book).

Then the surabhi cow bathed Kṛṣṇa with her milk, and Indra bathed Him with the water of the celestial Ganges through the trunk of his carrier elephant. After this, the surabhi cows and all the demigods and their mothers joined the heavenly king, Indra, in worshiping Lord Kṛṣṇa by bathing Him with Ganges water and the milk of the surabhis. Thus Govinda, Lord Kṛṣṇa, was pleased with all of them. The residents of all higher planetary systems, such as Gandharvaloka, Vidyādharaloka, Siddhaloka and Cāraṇaloka, all combined and glorified the Lord by chanting His holy name as their wives and damsels danced with great joy. They very much satisfied the Lord by incessantly pouring flowers from the sky. When everything was very nicely and joyfully settled, the cows overflooded the surface of the earth with their milk. The water of the rivers began to flow with various tasty liquids and give nourishment to the trees, producing fruits and flowers of different colors and tastes. The trees began to pour drops of honey. The hills and mountains began to produce potent medicinal plants and valuable stones. Because of Kṛṣṇa's presence, all these things happened very nicely, and the lower animals, who were generally envious of one another, were envious no longer.
(Krsna Book).

Present by the invitation of King Yudhiṣṭhira to participate in the great sacrifice were all the exalted demigods, including Lord Brahmā, Lord Śiva and Indra, the King of heaven, accompanied by their associates, as well as the predominating deities of the higher planetary systems, including Gandharvaloka, Siddhaloka, Janaloka, Tapoloka, Nāgaloka, Yakṣaloka, Rākṣasaloka, Pakṣiloka and Cāraṇaloka, as well as famous kings and their queens. All the respectable sages, kings and demigods who assembled there agreed unanimously that King Yudhiṣṭhira was quite competent to take the responsibility of performing the Rājasūya sacrifice; no one was in disagreement on this fact.
(Krsna Book).

The executive members who had performed the sacrifice—the priests, religious ministers and brāhmaṇas—all loudly chanted the Vedic hymns. The demigods and the inhabitants of Pitṛloka and Gandharvaloka, as well as many sages, showered flowers from the sky. The men and women of Hastināpura, or Indraprastha, their bodies smeared with scents and floral oils, were nicely dressed in colorful garments and decorated with garlands, jewels and ornaments. Enjoying the ceremony, they threw on one another liquid substances like water, oil, milk, butter and yogurt. Some even smeared these on each other's bodies. In this way, they enjoyed the occasion.
(Krsna Book).