SMART HOUSE / Controllers to work with Google Home: garage door, gas cooker, alarm panel

Hi, Gentlemen can you advise what drivers can be installed to work with Google Home the idea is simple

Garage door - opening, closing
Gas cooker - temperature control, switching on/off
Alarm panel - arming/disarming

Ultimately I would still like to add a gerdy vlock cylinder - unless you have any interesting alternatives,

I haven't checked yet but I would like to fit an external gate cylinder but don't know if I can find one.

The choice of devices that work with GH is very large. It depends on what you have - e.g. what the WiFi range is like, how the gate/furnace is controlled, how you want to connect it (e.g. wired, WiFi, Zigbee), how far away the gate is, etc. The factors influencing the choice are many.
Disarming the alarm via GH is not a good idea in my opinion - maybe still by voice - a burglar will be able to disarm .

I am interested in wifi modules, wifi coverage of the entire property, the gate is currently radio-controlled (from the remote control), beretta gas cooker I make no secret of the fact that I am a layman For the first target I set myself a garage door

The choice of devices is large - it's also a question of budget. Devices on WiFi have disadvantages - of the wireless ones consider Zigbee better - compared to WiFi they are more stable, faster, less sensitive to interference, do not overload the network.
Google Home in general is a cloud-based operation - this has its drawbacks. Security devices such as alarm or gate, front door - better to do as separate systems for security reasons. With an alarm control unit you can control the garage door, for example. An interesting proposal is e.g. Ropam's NeoGSM - apart from alarm functions, control from the application enables control of many devices. There is no direct integration with voice commands, but you can use the inputs of the control panel and control them by voice via devices on WiFi or Zigbee. To the extent of ensuring security, of course.

Of the cheaper ones, e.g. Tuya devices - they have e.g. lock cylinders, but also handles that can be opened with a fingerprint, magnetic card, code and via GH or Alexa (I would not enable opening by voice for security reasons). For heating, wall and radiator thermostats. Also, lighting and socket control. You can create automations, scenarios, connect to GH or Alexa. It works in the cloud.
Of the slightly more expensive ones, see, for example, Homematic IP - the CCU3 control unit allows local automation programming.
That's a start...

When it comes strictly to voice control via Google Home, it is practically possible to control any device that can be controlled via MQTT or Node-Red. Consequently, you need to have at least an MQTT broker and nodejs in your local network. And once you have that, you might as well have one of the open Smart Home systems. I say this again and again - Hassio, Domoticz, OpenHAB and others. There are many, some easier some more difficult. The choice is yours. I only urge you to learn Node-Red, which I think is the best automation tool on earth.