Is it possible to run each suite on a specific Grid that I manually created, whenever I choose to execute it through Alchemy Grid Works Location?

If you configure the Alchemy Gridworks integration to execute on a specific grid, then when the test completes, the grid is not destroyed.  To do this get the gridId from the Gridworks UI.  The gridID is in the red box below.  To get straight to the GridWorks UI, login at: https://ui.alchemytesting.cloud/dashboard

Now in the Alchemy client add the gridID to your Alchemy Gridowrks configuration.

Now when you execute using the Gridorks router configured in this manner, the existing grid will be used, and not destroyed at the end of the suite execution.  The nodes will stop according to the timeouts set in the configuration.  However, the Recordings of executed tests on nodes spun up during the test will be available in the Recordings.

Hope this helps, I will also add that you can alter the target grid at runtime by manipulating the command line to run with -CLD_gridId <<gridID>>.  Where <<gridID>> is the gridID of the existing grid in Alchemy Gridworks where you want to run the suite.  So, it doesn't matter if the existing gridID was different or even missing from the original executable when it was built.