Garry's Mod is missing some shared libraries

**Game information**
Garry's Mod (Steam version)

**Distribution name and version where applicable**

```
NAME="openSUSE Tumbleweed"
# VERSION="20190509"
ID="opensuse-tumbleweed"
ID_LIKE="opensuse suse"
VERSION_ID="20190509"
PRETTY_NAME="openSUSE Tumbleweed"
ANSI_COLOR="0;32"
CPE_NAME="cpe:/o:opensuse:tumbleweed:20190509"
BUG_REPORT_URL="https://bugs.opensuse.org"
HOME_URL="https://www.opensuse.org/"
LOGO="distributor-logo"
```

**Flatpak info**
flatpak --version
> Flatpak 1.2.4

flatpak --gl-drivers
> nvidia-418-52-05

**Problem description**

After pressing Play button in Steam, game shows the message that client.so cannot find some SO files.
Here is the list of this files:

- libgtk-x11-2.0.so.0
- libgdk-x11-2.0.so.0
- libgconf-2.so.4
- libdbus-glib-1.so.2
- libpng12.so.0
- libgcrypt.so.11

Game has a 32bit executable.

**Does this issue reproduce with native Steam**

No, game loads SO's from /usr/lib.