Welcome to the forum!
Have you tried contacting the Norseman in Calgary? I wonder if they stock the Gamme 54?
I am assuming that you want this ski for the XC performance they have to offer? If so- you need to go at least 200cm- and I recommend 210cm.
There are a number of skiers on this site that have had the wonderful opportunity of being properly "sized" on Asnes skis.
I am not one of them, unfortunately! I have had to hope for the best!
What I do know is that all of the Asnes dealers that I have actually spoken to (Norseman, Neptune, Sport Albert) have stated that there is some difference between sets of solid-wood cores XC and Fjellskis. They much prefer having someone in their shop and sizing a set of skis to a skier's weight, and personal skiing context...
I am wondering whether the Norseman has the Gamme 54 in stock and whether you could actually choose a set?
What I can tell you is that the Gamme 54 is not really a Classic double-cambered ski...
It is double-cambered, but overall the camber is low-profile- closer to a typical camber-and-a-half than a true double-cambered ski. When I evenly stand on my 210cm Gammes- on the floor- there is barely an open wax pocket there- certainly not worth measuring. For comparison- my 210cm E99 Tours are perhaps only a tiny bit more resistant underfoot- despite the fact that they have a significantly higher uncompressed camber than the Gamme...
I weigh 185lbs and have the 210cm Gamme 54.
The Gamme 54 is definitely stiffer and more resistant underfoot than skis like the Ingstad, Combat Nato, E-109.
However- the Gamme 54- like the E-99- is a "double"-cambered XC ski designed for highly vairiable backcountry snow- and as such is just soft enough to provide decent kick in soft snow- it is brilliant.
The higher-cambered wax pocket of the E99 Tour is more effectively released when striding than the Gamme 54- but the Gamme 54 has a longer and more stable glide surface, and is easier to evenly pressure in a downhill turn.
Please forgive the long-winded essay! What I am getting to is that I really don't think that the Gamme is cambred and stiff enough to be worried about having too stiff and cambered a ski for your weight.
(As an alternate example, the more-cambered and stiffer Amundsen may be a different thing altogether...)
The only advantage a short Gamme is going to give you is that it
might be more maneuverable- and it will have a shorter turn radius...
But- I personally don't pick these skis because of their turn radius- I choose them for their XC and climbing performance on backcountry snow. If I need to make a tight radius turn with a ski like this, I make step/jump turns- not linked turns (these are skis are so light this is easy to do!) And when I have room- they do make beautiful wide-open linked turns!!!
So- my point? I wouldn't worry about camber and stiffness with this ski.
If you want a shorter ski to make tight-radius turns then I would suggest looking at a different ski.
Have you priced out an order from Sport Albert?
https://www.sportalbert.de/
The final price would not include VAT and the shipping cost is not crazy.
And- if you buy the skis in a package (i.e. with bindings, etc.) the cost comes down. I have priced it out a number of times and it has been very competitive with LaCordee and the Norseman...
And as a final note- if my memory is correct- most every skier- on this site- that has been sized on Asnes Fjellskis at Neptune has been advised to size-up not down...