Q>Where Can I download the gapps of CM 12.1 for T999

I want to flash the CM 12.1 to my T-Mobile Galaxy S III but I don't know where to download the gapps for the latest nightly here

i also dont know if T-Mobile is arm, arm64, or x86
so I cant download in this site from cynogenmod

another question- is it the Cyanogen Recovery from this link will be use to flash the ROM or it is the recovery that will be use after flashing the CM12.1?