While logged into your Gimkit account at gimkit.com/me, click on "Creative" in the top menu.

https://lh7-us.googleusercontent.com/oBsHCpb0awLnHCrXw_fUYp6sE06W4J7e2gsWL-oPRqP2ORG6gR8bpXhNVklg2AeYNX_hfd1dUq5J2NHSHD9-r4oSpTVfStePXbfBCSyzs5kHCwKtyTe5a3vnoZU8ElNP3E7Up7sW3RwPJ8iCcB_sFA

Hover over the three-button menu on the Map you want to delete.

https://lh7-us.googleusercontent.com/ZgvES0gLj7PkQWQQZeUci7P3t1FT1iOtbnT-R6t49aBZ7-u3xxeDamwTwi-u7n8e6eitigTAh68fIxdB9BS4JXZ3AigFDWrTWvTDKpBg-HxhAKm1Avuc-2CyLaWwMliH3gF7Dd_2d5zWzXQgL9lGXw

Click "Delete."

https://lh7-us.googleusercontent.com/dGDQ11APacYPm1RgqApXR9azUZmIJb6RKJm_h_nGh0isVDIq_OOt6aE2y34H5ib3A8U7_RZsfhcosAhdnFtXmlFAteCnQsGLpQHFrelaM0P-zg2LqD8FJsCqn9d6McCjHEH86erOhOpTaW6geMd9vg

In the confirmation pop-up, enter the name of the Map you want to delete.

https://lh7-us.googleusercontent.com/9d5KT_cfdtgoHJWP8rD1IeqMe7WnAeXvz2PCxZuPhKdEPFgm4U0zztKsNjTjPwXF8ipymfui02Zd-9foGJayqSaGsSlkE7zQUBWslER9INQx9Kr4szBprBVnthbJ8qj4t5Ag6cza07H4XkxCuKrcvg

Click on the red "Delete Map" button.