Recreating a Node Status Dependent Round Robbin DNS effect with F5

Ok thank you. The F5 11.4.1 box in which I would like to try to implement this solution shows that the GTM is "licensed" but is not enabled under the provisioning column (it shows "none"). When just putting a check mark in the box, a drop down box appears allowing me to chose between "nominal" and "minimum". This box is the actual production box. My question is : can I simply turn on the GTM feature and update the box without adverse impacts of any sort? Can GTM, once installed, have all kind of unforeseen effects? Can it interfere with our virtual setups? I would like no risk at all, given it is a production box.

Thanks