I think you spelled "Part 95" wrong.
Part 90 rules do NOT apply to GMRS, any more than Part 97 rules do (or vice-versa).
Part 95 has its own definition section (95.303) where we find:
Base station. A station at a fixed location that communicates directly with mobile stations and other base stations.
Control station. A station at a fixed location that communicates with mobile stations and other control stations through repeater stations, and may also be used to control the operation of repeater stations.
Mobile station. A station, intended to be used while in motion or during halts at unspecified locations, that communicates directly with base stations and other mobile stations, and with control stations and other mobile stations through repeater stations.
So as defined by Part 95 (which covers GMRS), if you have a radio at home connected to a power supply and antenna on your roof and are talking simplex to either a mobile (which includes HT) radio or to another 'fixed' installation, that's considered a base station. If you are using that same radio to talk through a repeater, that's a control station.
The fact that some think those definitions are "dumb", or don't make sense is not relevant, nor is what Part 90 might say since Part 90 doesn't apply to GMRS.
Not sure how this relates to the horrible suffering of those who must bear the burden of hearing people use their callsigns, but whatever.