Maagar Mochot conducted a poll of 507 people with a 4.3% margin of error for Yisrael Hayom that was published on Dec 27 2019.
Scenario #1: With Gantz Party
Current Knesset seats in [brackets]
31 [30] Likud
15 [-–] Gantz Party
12 [13] The Joint (Arab) List
11 [11] Yesh Atid
11 [08] Bayit Yehudi
07 [24] Zionist Union
07 [06] Yahadut Hatorah/UTJ
06 [01] Gesher (Orly Levy)
05 [10] Kulanu
05 [05] Meretz
04 [07] Shas
04 [05] Yisrael Beitenu
02 [–-] Yaalon
00 [–-] Zehut, Green Leaf, Yachad (as other) under 3.25% threshold
62 [66] Current Right-Religious Coalition+Y.B.
58 [54] Current Center-Left-Arab Opposition+Gantz-Y.B.
Scenario #2: With Lapid-Gantz Party
Current Knesset seats in [brackets]
30 [30] Likud
25 [11] Yesh Atid + Gantz
12 [13] The Joint (Arab) List
10 [08] Bayit Yehudi
08 [24] Zionist Union
07 [06] Yahadut Hatorah/UTJ
06 [10] Kulanu
06 [01] Gesher (Orly Levy)
05 [05] Meretz
05 [05] Yisrael Beitenu
04 [07] Shas
02 [–-] Yaalon
00 [–-] Zehut, Green Leaf, Yachad (as other) under 3.25% threshold
62 [66] Current Right-Religious Coalition+Y.B.
58 [54] Current Center-Left-Arab Opposition+Gantz-Y.B.
Scenario #3: With Zionist Union-Gantz Party
Current Knesset seats in [brackets]
32 [30] Likud
16 [24] Zionist Union + Gantz
14 [11] Yesh Atid
12 [13] The Joint (Arab) List
11 [08] Bayit Yehudi
07 [06] Yahadut Hatorah/UTJ
07 [01] Gesher (Orly Levy)
06 [10] Kulanu
04 [07] Shas
04 [05] Yisrael Beitenu
04 [05] Meretz
02 [–-] Yaalon
00 [–-] Zehut, Green Leaf, Yachad (as other) under 3.25% threshold
64 [66] Current Right-Religious Coalition+Y.B.
55 [54] Current Center-Left-Arab Opposition+Gantz-Y.B.
Note: Poll comes out to 119 seats and not 120.
Additional Questions:
Who is most suited for Prime Minister?
35% Netanyahu, 24% None of the above, 14% Gantz, 10% Lapid, 6% Gabbai, 5% Bennett, 3% Liberman, 3% Yaalon
Who is most suited for Defense Minister?
38% Gantz, 21% None of the above, 15% Bennett, 12% Galant, 9% Netanyahu, 5% Liberman
Jeremy's Knesset Insider 
It would be helpful if you could include information in regards parties that are below the threshold like you have given for Gantz. I would suggest that you f give the number of seats in Brackets. ie Shass [4] Yachad (2)
Shas and Yachad are sadly led by 2 stubborn idiots, the interesting thing about these polls are that they show Shas at 4 barely making the cut. Yet unless i read wrong I recall Shas gaining enough votes in the recent local election to retain their seats. Perhaps Jeremy could comment on this. looking at the bigger picture I see Gantz joining a Likud administration and I think Labour/Yesh/YB will be losers and I don’t see Gesher getting anywhere near the seats projected in fact I doubt they will make the threshold when it really come to it
Sorry that should have been Yaalon. It would be helpful if you could include information in regards parties that are below the threshold like you have given for Yaalon. I would suggest that you f give the number of seats in Brackets. ie Shass [4] Yachad (2)
Time for a new Knesset Jeremy Poll of Polls!