Hi Valerie,
Thanks for your interest in Syncfusion product.
We have attached the LinearGauge sample with Horizontal orientation to satisfy you requirement, please find the sample from the below location.
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=LinearGauge-1970616613.zipLet us know, if you have any queries.
Regards,
Sujitha S