Very pretty vase !! I am trying to find the names of the G&G for you !! This evidently is a small company and may have been merged into another one !! Give me a day or two !! If Friedrich shows up he likely will know the details !! He is more of an expert on the region !!
I have a Gaebler & Gröschl vase. This was made between 1889 – 1903. and it shows those marks