Apex domains cannot have CNAME records.
Question and response
Question
dig gorillaservers.com. NS
Answer
gorillaservers.com. 5 NS ns2.gorillaservers.com.
gorillaservers.com. 5 NS ns1.gorillaservers.com.
Authority
The response has no authority records.
Additional
ns1.gorillaservers.com. 5 A 104.250.131.147
ns2.gorillaservers.com. 5 A 23.239.96.227
ns1.gorillaservers.com. 5 AAAA 2606:c700:1:f:0:0:0:2
ns2.gorillaservers.com. 5 AAAA 2606:c700:4020:f:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0