The Second Garden (http://archiveofourown.org/works/1306342/chapters/2713654) (WIP)
summary: Gadreel wants redemption. Castiel wants Heaven to re-open. And all the angels who have died, don't want to stop existing. So when an anchor is created to keep the dead angels tied together until Heaven opens again, Gadreel finds a way to redeem himself: protect the anchor at all costs.

Yesterday's Paradise (http://archiveofourown.org/works/1583144/chapters/3363350) (WIP, Sam/Gadreel, Cas/Dean)
summary: "Who we were, what we did... That's not who we are now." This is the story of how a lost angel and a broken man saved one another, by virtue of a single leap of faith. (Goes AU at the end of "I'm No Angel." Dean convinces Gadreel to talk to Sam, and Castiel remains at the bunker.)

Sorry (http://archiveofourown.org/works/1616483)
summary: Gadreel wakes to Sam tending his wound and apologizes for previously possessing him. Takes place after 9.22 Stairway to Heaven.

Silence (http://archiveofourown.org/works/1543703)
summary: It wasn’t the torture that broke him. It was the silence.

All the Lonely People (http://archiveofourown.org/works/1518971)
summary: Gadreel and his vessel find some small measure of comfort in each other.

Phoenix (https://www.fanfiction.net/s/10367714/1/Phoenix)
summary: He sacrificed himself for the greater good but there was still many things he needed to do still. A post finale Gadreel fic.

Thank you so much!

No problem :D

If you don't mind self-recs, here's one for your request Nº2:

Meet You in Idaho
Even if Castiel can’t live in the bunker as long as Ezekiel is healing Sam, it doesn’t mean that Dean can’t stay in touch with the fallen angel. So staying in touch with Cas is exactly what Dean does. In more ways than he originally expected.
This goes AU after the events of Heaven Can't Wait. The differences from canon are practically nonexistent at first but they will be very major in later chapters.
(In this fic, Ezekiel is really Ezekiel and he plays a fairly big part in the whole scheme, although he only appears halfway through the 93 K story).
http://archiveofourown.org/works/1051339

Hey,
if you don't mind self-recs, there's this one:
It's Like Motel Rooms (http://archiveofourown.org/works/1070227)
Sam and Gadreel have some things in common