I purchased a Globalsat BR-355S4 and modified it for use with this scanner. This video shows some tips that might help you if you decide to do this. The forum describing this mod is here: forums.radiore... Good Luck!
The Globalsat BR-355S4 was sold by Uniden with the Uniden name on it when the Uniden 436 & 536 were introduced in 2014 & 2015. I have one that I still use. An adapter to use the BR-355S4 with the SDS100 was released in 2018 which I have. The newer BC-SGPS runs at 9600 baud and comes with adapters for all of Uniden's GPS capable scanners. Both of these are great to use when traveling with your scanners.