Welcome, @drcottoncandy
You can get both the reference genome and the reference annotation from NCBI, load those into Galaxy by URL, standardize the data formats (RNA STAR is picky about formats, so don’t skip this!), then select both datasets from the history at runtime.
The example linked here was also from NCBI, so this should be really close to what you’ll want to do, too.
Please give that a try and let us know if you have any questions! 