I used plain Gunscrubber for years on Glocks - with no problems.
Then, they have more recently come out with a polymer gun safe version. I now use that - although I probably use the can maybe 2x a year. I typically use Breakfree CLP for everything. Gun Scrubber is just for when its really dirty.
Use the Polymer safe version and U will be fine. If you got the wrong version - see if you can exchange it.