Yes, you can create a quiz in Grid style game using a spreadsheet.
Step 1: Create a game in the Grid style.
Step 2: Open the game details/game preview screen.
Step 3: Tap on content below in game preview screen.
Step 4: Tap on “prefer to edit with a spreadsheet?”
Step 5: Tap on download Template File.
Step 6: Make a Quiz in the downloaded template.
Step 7: Tap on Upload CSV File.
Step 8: Select the file and tap on open.
On Desktop or Mac or Web app