Connecting multiple hubs to a single Z-Wave device
As per Z-Wave specification, no. A Z-Wave node (device) can only be paired to one hub (the designated 'primary' controller). 'Secondary' controllers added to the primary controller will lose their z-wave netword/added nodes and just act as a relay remote control. I don't believe adding the Wink Hub as a secondary controller is the option you're looking for since you will lose any nodes added to it and you will have to re-add them to your primary controller (your GE Simon XT for instance).

However, some controllers, such as Vera and VeraLite, allow you to bridge two or more controllers via ethernet/wi-fi and to pass-through Z-Wave requests to devices present on either controller. The controllers remain independent of each other from a Z-Wave point of view, an communicate to each other via your ethernet/wi-fi network. I have not come across this funcionality in GE Simon XT and Wink hubs.

With the Vera Z-wave controllers, as an example of increasing range and reliability, you can:

Install one Vera on your ground-floor. Pair ground-floor nodes to this Vera.

Install another Vera on on your first-floor. Pair second-floor nodes to this Vera.

Designate one Vera as your 'main' Vera (that is, the one you'd use to control via the web, iOS app, Z-Wave remotes, etc - your go-to controller basically). Under this Vera's config, select Add Devices and choose UPNP devices.

The 'main' Vera will then locate the 'other' Vera on your LAN and show the nodes on the 'main' Vera's device panel. You can then control the 'other' nodes via your 'main' Vera. The 'main' Vera will send the required commands via LAN to the 'other' Vera to be sent via Z-Wave to it's associated nodes.