Hi Kimmy,
Thank you for reaching out and we hope you are in good health. We appreciate your interest in Samsung home appliances, specifically with Samsung - 1.1 cu. ft. Smart SLIM Over-the-Range Microwave with 400 CFM Hood Ventilation, Wi-Fi & Voice Control - Stainless steel.
Yes, this over-the range can be installed over a gas stove. I have shared the installation guide below. Please access the link and turn to page 7 for the mounting space.
https://downloadcenter.samsung.com/content/EM/202202/20220223181502042/Install_ME11A7510DS_AA_DE68-04709A-01_EN-MES_220120.pdf
Please feel free to communicate with us through the channels below if you have additional questions.
1. Facebook Messenger: http://m.me/samsungsupport
2. Twitter: https://twitter.com/messages/compose?recipient_id=18768513
3. Samsung Community: https://us.community.samsung.com/t5/Samsung-Community/ct-p/us
Your reference number: 1144485166
Leo