Well the Gator Roll is a term in wrestling for the technique used to roll an opponent to his back from the sprawl position to get into a pin. It looks the exact same as a setup for an anaconda choke and there are various grips to achieve this. The only grip where a side choke can be applied is the one used in the anaconda choke. Where you roll underneath the opponent while still maintaining the hold. So to put it simply, the Anaconda choke is the Jiu-Jitsu choke you can achieve by utilising the "gator roll", which is a wrestling move. Same deal with the turkey bar which was learned by Rolls Gracie from Bob Anderson in the 70's, and then turned into a submission move called the "Americana" or "keylock" with many variations.
Well, if you want to get technical the gator roll is rarely ever used to pin with, because a good wrestler won't get caught in a pinning combination off of it. It is used almost exclusively in freestyle and greco to gain 2 exposure points from a sprawled front headlock position or 3 points from a standing front headlock position.
