Board Thread:Questions and Answers/@comment-28487792-20160610064830/@comment-16461120-20160610070428

Guardians of the Galaxy is the current ongoing team book and would be considered happening in the present, i.e. during All-New, All-Different Marvel.

Guardians of Infinity is a limited series which appears to have taken place during the eight month time gap between Secret Wars and All-New, All-Different Marvel. The characters it features which are not in the main Guardians of the Galaxy book are from alternate realities. (Nikki, Martinex, Major Victory, and Charlie-27 are from 1000 years in future; meanwhile, Stella, Skytower, Astrolabe, Aerolite, and The Colonizer are from 1000 years in the past.) The secondary stories in the back of each issue take place during gaps between the main team's Guardians of the Galaxy adventures.

Star-Lord, Drax, Rocket Raccoon and Groot, and soon Gamora are side adventures which tell backstory as well as present day events, so the stories therein either took place before Guardians of the Galaxy or during gaps between the main team's story like the secondary stories in Guardians of Infinity do.