Tests/gps pi

[yashasvid]

Title

Added tests for the GPS module to improve coverage

Description

The purpose of the PR is to improve the code coverage for the GPS module.

Types of Changes

Put an x in the boxes that apply

• [x] Feature (non-breaking change which adds functionality)
• [ ] Bug Fix (non-breaking change that fixes an issue)
• [ ] Breaking Change (feature/fix that causes existing features to not work as expected)
• [ ] Documentation

Checklist

• [x] I have read the [contribute]contributing doc
• [x] Classes, scripts, and environment variables follow existing naming convention
• [x] Lint and Unit tests pass locally
• [x] New features on hardware have been tested on a local Raspberry Pi
• [x] Mention new programs/binaries if any must be installed along with this change
• [x] Mention new environment variables if any have been added to hardware/env file
• [x] Test coverage should not drop more than 3%
• [x] Any new required python modules are added to the requirements.txt

[yashasvid]

I am planning to add more tests to improve the coverage. Let me know if you have any feedback on the existing tests.